摘要
介绍了一种用于电动汽车无线充电系统的功率调节方法,通过在接收端整流桥低边二极管上并联两个MOSFET,控制器能调节其导通时间来完成输出功率的调节。分别介绍了两种模式下MOSFET的导通时序,并以双边LCC的补偿拓扑为例,在考虑了高频开关谐波的情况下,导出了其输出功率和功率因数随导通延时角的变化公式,并分析了如何保证发射端MOSFET的软开关。然后描述了该功率调节系统的硬件实现,并搭建了一个无线充电可控整流功率的200 W样机。最后根据分析出的该方法的功率调节范围、功率因数变化等特性,得出这种调节方法在小范围内效率高,比较适合发射和接收端双边控制的结论。
A power regulation method for wireless power transmission of electric vehicle is introduced.By adding two anti-parallel MOSFETs to.the low side of rectifier bridge and adjusting it turn-on time,the output power is regulated.Based on the double side LCC compensation topology the relation between output power, power factor and MOSFETs conducting angle are derived and analyzed.Then the approach to ensure the zero voltage switch (ZVS)of primary side MOSFETs is derived.The hardware of power regulation system is described,and a prototype of 200W wireless charger is established.Finally,according to the previous analyzation of output power and power factor,the power regulation range,merit and demerit and the range of the application of the system are summarized.
出处
《机电一体化》
2018年第7期49-55,60,共8页
Mechatronics
关键词
无线充电
功率调节
LCC补偿拓扑
可控整流
wireless charger
power regulation
LCC compensation topology
controlled rectification
